Synonym(s): Malonyl dichloride Formula: CH2(COCl)2 Formula Weight: 140.95 CAS No.: 1663-67-8 UN Number: UN2920 Purity: 97% Density: 1.449g/mLat 25°C(lit.) Supplemental Hazards: Reacts violently with water. Storage: 2-8°C Packaging: 5, 25, 100 g in ampule